辽河盆地东部凹陷沙三段煤层测井解译

Logging interpretation of coalbed of third member of Shahejie formation in eastern depression of Liaohe basin

为查明辽河盆地东部凹陷沙三段煤层、煤种、煤质特征,并为本区煤层气资源的预测和评价提供依据,作者应用煤田测井曲线解释的基本原理和方法,对百余口油田钻井的测井资料进行了综合研究,系统总结了褐煤、烟煤、无烟煤在电阻率曲线、密度曲线、天然放射性曲线和自然电位曲线上的响应,并据之对煤层及其厚度进行了重新确定;进而指出本区的煤种主要为长焰煤、褐煤、其次为气煤;同时,根据天然放射性曲线解读的信息,得出从南向北煤的灰分具有逐渐增高的规律。

To find out coalbed, types of coal and characters of coal property of third member of Shahejie formation in eastern depression of Liaohe basin and provide data for prediction and evaluation of coalbed gas resource in this area, the authors apply the basic principle and method of logging curve interpretation in coal field to study more than one hundred logging datum in oil field comprehensively. The paper concludes the responses of lignite, soft coal and anthracite on resistivity curve, density curve, natural activity curve and spontaneous potential curve and according to it confirms coalbed and its thickness again. Then it points out that the main types of coal are long flame coal and lignite and the following is gas coal. And according to the information unscrambled from natural activity curve, it deduces the rule that ash increases from south to north gradually.